9. A FULLY INTEGRATED 144 MHZ WIRELESS-POWER-RECEIVER-ON-CHIP WITH AN ADAPTIVE BUCK-BOOST REGULATING RECTIFIER AND LOW-LOSS H-TREE SIGNAL DISTRIBUTION

Department: Bioengineering
Research Institute Affiliation: Agile Center for Wearable Sensors (CWS)
Faculty Advisor(s): Gert Cauwenberghs | Patrick P. Mercier

Primary Student
Name: Chul Kim
Email: chk079@ucsd.edu
Phone: 858-534-2230
Grad Year: 2017

Student Collaborators
Jiwoong Park, jip049@eng.ucsd.edu | Abraham Akinin, akinin@gmail.com | Sohmyung Ha, sohmyung@gmail.com | Rajkumar Kubendran, rchinnak@eng.ucsd.edu | Hui Wang, huw015@eng.ucsd.edu

Abstract
Emerging applications such as mm-sized modular neural interfacing devices are now being enabled by fully integrating wireless power transfer (WPT) functionality on- chip. Conventional designs, which first rectify then regulate, suffer from cascaded losses that limit efficiencies, while prior-art regulating rectifiers require a large external coil.An adaptive buck-boost resonant regulating rectifier (B2R3) with an integrated on-chip coil and low-loss H-Tree power/signal distribution is presented for efficient and robust wireless power transfer (WPT) over a wide range of input and load conditions. The B2R3 integrated on a 9 mm2 chip powers integrated neural interfacing circuits as a load, with a TX-load power conversion efficiency of 2.64 % at 10 mm distance, resulting in a WPT system efficiency FoM of 102.

Industry Application Area(s)
Electronics/Photonics | Life Sciences/Medical Devices & Instruments | Semiconductor

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